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460 lines
15 KiB
Go
460 lines
15 KiB
Go
// Copyright (c) 2018 Shivaram Lingamneni <slingamn@cs.stanford.edu>
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// released under the MIT license
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package irc
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import (
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"errors"
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"fmt"
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"regexp"
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"time"
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"github.com/goshuirc/irc-go/ircfmt"
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"github.com/oragono/oragono/irc/sno"
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"github.com/oragono/oragono/irc/utils"
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)
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const (
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hostservHelp = `HostServ lets you manage your vhost (i.e., the string displayed
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in place of your client's hostname/IP).`
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hsNickMask = "HostServ!HostServ@localhost"
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)
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var (
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errVHostBadCharacters = errors.New("Vhost contains prohibited characters")
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errVHostTooLong = errors.New("Vhost is too long")
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// ascii only for now
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defaultValidVhostRegex = regexp.MustCompile(`^[0-9A-Za-z.\-_/]+$`)
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)
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func hostservEnabled(config *Config) bool {
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return config.Accounts.VHosts.Enabled
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}
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func hostservRequestsEnabled(config *Config) bool {
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return config.Accounts.VHosts.Enabled && config.Accounts.VHosts.UserRequests.Enabled
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}
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var (
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hostservCommands = map[string]*serviceCommand{
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"on": {
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handler: hsOnOffHandler,
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help: `Syntax: $bON$b
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ON enables your vhost, if you have one approved.`,
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helpShort: `$bON$b enables your vhost, if you have one approved.`,
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authRequired: true,
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enabled: hostservEnabled,
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},
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"off": {
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handler: hsOnOffHandler,
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help: `Syntax: $bOFF$b
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OFF disables your vhost, if you have one approved.`,
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helpShort: `$bOFF$b disables your vhost, if you have one approved.`,
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authRequired: true,
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enabled: hostservEnabled,
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},
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"request": {
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handler: hsRequestHandler,
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help: `Syntax: $bREQUEST <vhost>$b
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REQUEST requests that a new vhost by assigned to your account. The request must
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then be approved by a server operator.`,
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helpShort: `$bREQUEST$b requests a new vhost, pending operator approval.`,
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authRequired: true,
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enabled: hostservRequestsEnabled,
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minParams: 1,
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},
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"status": {
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handler: hsStatusHandler,
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help: `Syntax: $bSTATUS [user]$b
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STATUS displays your current vhost, if any, and the status of your most recent
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request for a new one. A server operator can view someone else's status.`,
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helpShort: `$bSTATUS$b shows your vhost and request status.`,
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enabled: hostservEnabled,
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},
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"set": {
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handler: hsSetHandler,
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help: `Syntax: $bSET <user> <vhost>$b
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SET sets a user's vhost, bypassing the request system.`,
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helpShort: `$bSET$b sets a user's vhost.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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minParams: 2,
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},
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"del": {
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handler: hsSetHandler,
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help: `Syntax: $bDEL <user>$b
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DEL deletes a user's vhost.`,
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helpShort: `$bDEL$b deletes a user's vhost.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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minParams: 1,
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},
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"waiting": {
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handler: hsWaitingHandler,
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help: `Syntax: $bWAITING$b
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WAITING shows a list of pending vhost requests, which can then be approved
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or rejected.`,
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helpShort: `$bWAITING$b shows a list of pending vhost requests.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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},
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"approve": {
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handler: hsApproveHandler,
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help: `Syntax: $bAPPROVE <user>$b
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APPROVE approves a user's vhost request.`,
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helpShort: `$bAPPROVE$b approves a user's vhost request.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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minParams: 1,
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},
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"reject": {
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handler: hsRejectHandler,
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help: `Syntax: $bREJECT <user> [<reason>]$b
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REJECT rejects a user's vhost request, optionally giving them a reason
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for the rejection.`,
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helpShort: `$bREJECT$b rejects a user's vhost request.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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minParams: 1,
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maxParams: 2,
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unsplitFinalParam: true,
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},
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"forbid": {
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handler: hsForbidHandler,
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help: `Syntax: $bFORBID <user>$b
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FORBID prevents a user from using any vhost, including ones on the offer list.`,
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helpShort: `$bFORBID$b prevents a user from using vhosts.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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minParams: 1,
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maxParams: 1,
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},
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"permit": {
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handler: hsForbidHandler,
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help: `Syntax: $bPERMIT <user>$b
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PERMIT undoes FORBID, allowing the user to TAKE vhosts again.`,
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helpShort: `$bPERMIT$b allows a user to use vhosts again.`,
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capabs: []string{"vhosts"},
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enabled: hostservEnabled,
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minParams: 1,
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maxParams: 1,
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},
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"offerlist": {
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handler: hsOfferListHandler,
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help: `Syntax: $bOFFERLIST$b
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OFFERLIST lists vhosts that can be chosen without requiring operator approval;
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to use one of the listed vhosts, take it with /HOSTSERV TAKE.`,
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helpShort: `$bOFFERLIST$b lists vhosts that can be taken without operator approval.`,
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enabled: hostservEnabled,
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minParams: 0,
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maxParams: 0,
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},
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"take": {
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handler: hsTakeHandler,
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help: `Syntax: $bTAKE$b <vhost>
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TAKE sets your vhost to one of the vhosts in the server's offer list; to see
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the offered vhosts, use /HOSTSERV OFFERLIST.`,
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helpShort: `$bTAKE$b sets your vhost to one of the options from the offer list.`,
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enabled: hostservEnabled,
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authRequired: true,
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minParams: 1,
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maxParams: 1,
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},
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"setcloaksecret": {
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handler: hsSetCloakSecretHandler,
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help: `Syntax: $bSETCLOAKSECRET$b <secret> [code]
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SETCLOAKSECRET can be used to set or rotate the cloak secret. You should use
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a cryptographically strong secret. To prevent accidental modification, a
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verification code is required; invoking the command without a code will
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display the necessary code.`,
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helpShort: `$bSETCLOAKSECRET$b modifies the IP cloaking secret.`,
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capabs: []string{"vhosts", "rehash"},
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minParams: 1,
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maxParams: 2,
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},
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}
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)
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// hsNotice sends the client a notice from HostServ
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func hsNotice(rb *ResponseBuffer, text string) {
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rb.Add(nil, hsNickMask, "NOTICE", rb.target.Nick(), text)
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}
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// hsNotifyChannel notifies the designated channel of new vhost activity
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func hsNotifyChannel(server *Server, message string) {
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chname := server.Config().Accounts.VHosts.UserRequests.Channel
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channel := server.channels.Get(chname)
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if channel == nil {
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return
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}
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chname = channel.Name()
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for _, client := range channel.Members() {
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client.Send(nil, hsNickMask, "PRIVMSG", chname, message)
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}
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}
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func hsOnOffHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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enable := false
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if command == "on" {
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enable = true
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}
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_, err := server.accounts.VHostSetEnabled(client, enable)
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if err == errNoVhost {
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hsNotice(rb, client.t(err.Error()))
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} else if err != nil {
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hsNotice(rb, client.t("An error occurred"))
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} else if enable {
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hsNotice(rb, client.t("Successfully enabled your vhost"))
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} else {
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hsNotice(rb, client.t("Successfully disabled your vhost"))
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}
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}
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func hsRequestHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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vhost := params[0]
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if validateVhost(server, vhost, false) != nil {
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hsNotice(rb, client.t("Invalid vhost"))
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return
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}
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accountName := client.Account()
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_, err := server.accounts.VHostRequest(accountName, vhost, time.Duration(server.Config().Accounts.VHosts.UserRequests.Cooldown))
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if err != nil {
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if throttled, ok := err.(*vhostThrottleExceeded); ok {
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hsNotice(rb, fmt.Sprintf(client.t("You must wait an additional %v before making another request"), throttled.timeRemaining))
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} else if err == errVhostsForbidden {
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hsNotice(rb, client.t("An administrator has denied you the ability to use vhosts"))
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} else {
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hsNotice(rb, client.t("An error occurred"))
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}
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} else {
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hsNotice(rb, client.t("Your vhost request will be reviewed by an administrator"))
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chanMsg := fmt.Sprintf("Account %s requests vhost %s", accountName, vhost)
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hsNotifyChannel(server, chanMsg)
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server.snomasks.Send(sno.LocalVhosts, chanMsg)
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}
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}
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func hsStatusHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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var accountName string
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if len(params) > 0 {
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if !client.HasRoleCapabs("vhosts") {
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hsNotice(rb, client.t("Command restricted"))
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return
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}
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accountName = params[0]
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} else {
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accountName = client.Account()
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if accountName == "" {
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hsNotice(rb, client.t("You're not logged into an account"))
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return
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}
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}
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account, err := server.accounts.LoadAccount(accountName)
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if err != nil {
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if err != errAccountDoesNotExist {
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server.logger.Warning("internal", "error loading account info", accountName, err.Error())
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}
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hsNotice(rb, client.t("No such account"))
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return
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}
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if account.VHost.Forbidden {
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hsNotice(rb, client.t("An administrator has denied you the ability to use vhosts"))
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return
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}
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if account.VHost.ApprovedVHost != "" {
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hsNotice(rb, fmt.Sprintf(client.t("Account %[1]s has vhost: %[2]s"), accountName, account.VHost.ApprovedVHost))
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if !account.VHost.Enabled {
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hsNotice(rb, client.t("This vhost is currently disabled, but can be enabled with /HS ON"))
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}
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} else {
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hsNotice(rb, fmt.Sprintf(client.t("Account %s has no vhost"), accountName))
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}
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if account.VHost.RequestedVHost != "" {
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hsNotice(rb, fmt.Sprintf(client.t("A request is pending for vhost: %s"), account.VHost.RequestedVHost))
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}
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if account.VHost.RejectedVHost != "" {
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hsNotice(rb, fmt.Sprintf(client.t("A request was previously made for vhost: %s"), account.VHost.RejectedVHost))
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hsNotice(rb, fmt.Sprintf(client.t("It was rejected for reason: %s"), account.VHost.RejectionReason))
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}
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}
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func validateVhost(server *Server, vhost string, oper bool) error {
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config := server.Config()
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if len(vhost) > config.Accounts.VHosts.MaxLength {
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return errVHostTooLong
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}
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if !config.Accounts.VHosts.ValidRegexp.MatchString(vhost) {
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return errVHostBadCharacters
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}
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return nil
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}
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func hsSetHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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user := params[0]
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var vhost string
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if command == "set" {
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vhost = params[1]
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if validateVhost(server, vhost, true) != nil {
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hsNotice(rb, client.t("Invalid vhost"))
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return
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}
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}
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// else: command == "del", vhost == ""
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_, err := server.accounts.VHostSet(user, vhost)
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if err != nil {
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hsNotice(rb, client.t("An error occurred"))
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} else if vhost != "" {
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hsNotice(rb, client.t("Successfully set vhost"))
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} else {
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hsNotice(rb, client.t("Successfully cleared vhost"))
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}
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}
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func hsWaitingHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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requests, total := server.accounts.VHostListRequests(10)
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hsNotice(rb, fmt.Sprintf(client.t("There are %[1]d pending requests for vhosts (%[2]d displayed)"), total, len(requests)))
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for i, request := range requests {
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hsNotice(rb, fmt.Sprintf(client.t("%[1]d. User %[2]s requests vhost: %[3]s"), i+1, request.Account, request.RequestedVHost))
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}
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}
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func hsApproveHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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user := params[0]
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vhostInfo, err := server.accounts.VHostApprove(user)
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if err != nil {
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hsNotice(rb, client.t("An error occurred"))
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} else {
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hsNotice(rb, fmt.Sprintf(client.t("Successfully approved vhost request for %s"), user))
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chanMsg := fmt.Sprintf("Oper %[1]s approved vhost %[2]s for account %[3]s", client.Nick(), vhostInfo.ApprovedVHost, user)
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hsNotifyChannel(server, chanMsg)
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server.snomasks.Send(sno.LocalVhosts, chanMsg)
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for _, client := range server.accounts.AccountToClients(user) {
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client.Send(nil, hsNickMask, "NOTICE", client.Nick(), client.t("Your vhost request was approved by an administrator"))
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}
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}
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}
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func hsRejectHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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var reason string
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user := params[0]
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if len(params) > 1 {
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reason = params[1]
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}
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vhostInfo, err := server.accounts.VHostReject(user, reason)
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if err != nil {
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hsNotice(rb, client.t("An error occurred"))
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} else {
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hsNotice(rb, fmt.Sprintf(client.t("Successfully rejected vhost request for %s"), user))
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chanMsg := fmt.Sprintf("Oper %s rejected vhost %s for account %s, with the reason: %v", client.Nick(), vhostInfo.RejectedVHost, user, reason)
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hsNotifyChannel(server, chanMsg)
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server.snomasks.Send(sno.LocalVhosts, chanMsg)
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for _, client := range server.accounts.AccountToClients(user) {
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if reason == "" {
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client.Send(nil, hsNickMask, "NOTICE", client.Nick(), client.t("Your vhost request was rejected by an administrator"))
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} else {
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client.Send(nil, hsNickMask, "NOTICE", client.Nick(), fmt.Sprintf(client.t("Your vhost request was rejected by an administrator. The reason given was: %s"), reason))
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}
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}
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}
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}
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func hsForbidHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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user := params[0]
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forbidden := command == "forbid"
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_, err := server.accounts.VHostForbid(user, forbidden)
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if err == errAccountDoesNotExist {
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hsNotice(rb, client.t("No such account"))
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} else if err != nil {
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hsNotice(rb, client.t("An error occurred"))
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} else {
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if forbidden {
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hsNotice(rb, fmt.Sprintf(client.t("User %s is no longer allowed to use vhosts"), user))
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} else {
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hsNotice(rb, fmt.Sprintf(client.t("User %s is now allowed to use vhosts"), user))
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}
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}
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}
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func hsOfferListHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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vhostConfig := server.Config().Accounts.VHosts
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if len(vhostConfig.OfferList) == 0 {
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if vhostConfig.UserRequests.Enabled {
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hsNotice(rb, client.t("The server does not offer any vhosts, but you can request one with /HOSTSERV REQUEST"))
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} else {
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hsNotice(rb, client.t("The server does not offer any vhosts"))
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}
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} else {
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hsNotice(rb, client.t("The following vhosts are available and can be chosen with /HOSTSERV TAKE:"))
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for _, vhost := range vhostConfig.OfferList {
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hsNotice(rb, vhost)
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}
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}
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}
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func hsTakeHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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config := server.Config()
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vhost := params[0]
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found := false
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for _, offered := range config.Accounts.VHosts.OfferList {
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if offered == vhost {
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found = true
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}
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}
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if !found {
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hsNotice(rb, client.t("That vhost isn't being offered by the server"))
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return
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}
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account := client.Account()
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_, err := server.accounts.VHostTake(account, vhost, time.Duration(config.Accounts.VHosts.UserRequests.Cooldown))
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if err != nil {
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if throttled, ok := err.(*vhostThrottleExceeded); ok {
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hsNotice(rb, fmt.Sprintf(client.t("You must wait an additional %v before taking a vhost"), throttled.timeRemaining))
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} else if err == errVhostsForbidden {
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hsNotice(rb, client.t("An administrator has denied you the ability to use vhosts"))
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} else {
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hsNotice(rb, client.t("An error occurred"))
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}
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} else {
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hsNotice(rb, client.t("Successfully set vhost"))
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server.snomasks.Send(sno.LocalVhosts, fmt.Sprintf("Client %s (account %s) took vhost %s", client.Nick(), account, vhost))
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}
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}
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func hsSetCloakSecretHandler(server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
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secret := params[0]
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expectedCode := utils.ConfirmationCode(secret, server.ctime)
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if len(params) == 1 || params[1] != expectedCode {
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hsNotice(rb, ircfmt.Unescape(client.t("$bWarning: changing the cloak secret will invalidate stored ban/invite/exception lists.$b")))
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hsNotice(rb, fmt.Sprintf(client.t("To confirm, run this command: %s"), fmt.Sprintf("/HS SETCLOAKSECRET %s %s", secret, expectedCode)))
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return
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}
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StoreCloakSecret(server.store, secret)
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hsNotice(rb, client.t("Rotated the cloak secret; you must rehash or restart the server for it to take effect"))
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}
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